I'm an Allen fan. For me this was not a one of his great films, but was an
entertaining, diverting one, with two terrific performances by Javier
Bardem and Penelope Cruz, a very good one by Rebecca Hall, and a decent
one by Scarlett Johanssen.
The key flaw for me-- Johanssen's character comes off as very shallow, so the complexity
of her relationships with Bardem and Cruz never seem more than
adolescent. I realize that's ultimately part of the point of the film,
but here it's way too obvious from minute one, not something we slowly
discover, and in turn that keeps the film from
ultimately feeling deeper and more complex.
None-the-less, a romantic bittersweet film I've enjoyed well enough to go back and re-watch.
Interestingly, even more than most of Allen's films this seems to ignite very different reactions
from viewer to viewer, so I'd encourage you to check it out for yourself
if you have any interest in the elements.